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Kiehl's flagship vitamin C serum — 10.5% L-ascorbic acid + 2% ascorbyl glucoside (combined 12.5% vitamin C) in a propylene glycol + silicone vehicle for stability. Direct competitor to SkinCeuticals C E Ferulic at half the price, with a meaningfully different texture (silicone-rich vs. SkinCeuticals' aqueous gel). The brand's most prescribed-by-derms SKU and Sephora bestseller in the prestige vitamin C category for over 15 years.
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A 24-karat-gold-plated microchannel device that delivers custom serum cocktails — usually micro-doses of Botox, hyaluronic acid, vitamins, and peptides — into the upper dermis.
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A cocktail of vitamins, amino acids, and hyaluronic acid injected into the superficial dermis — French-born, globally adopted, endlessly remixed.
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Powerful-Strength Line-Reducing Concentrate (12.5% Vitamin C) by Kiehl's is formulated for mature, normal, combination skin. Kiehl's flagship vitamin C serum — 10.5% L-ascorbic acid + 2% ascorbyl glucoside (combined 12.5% vitamin C) in a propylene glycol + silicone vehicle for stability. Direct competitor to SkinCeuticals C E Ferulic at half the price, with a meaningfully different texture (silicone-rich vs. SkinCeuticals' aqueous gel). The brand's most prescribed-by-derms SKU and Sephora bestseller in the prestige vitamin C category for over 15 years.
The key active ingredients in Powerful-Strength Line-Reducing Concentrate (12.5% Vitamin C) are Hyaluronic Acid, Vitamin C. It's known for: 10.5% L-ascorbic acid is at the upper end of efficacy for free-form vitamin C and Adenosine + hydrolyzed HA add anti-aging and hydration support without crowding the deck.
Yes, Powerful-Strength Line-Reducing Concentrate (12.5% Vitamin C) targets fine lines, dullness, hyperpigmentation. 10.5% L-ascorbic acid is at the upper end of efficacy for free-form vitamin C
Powerful-Strength Line-Reducing Concentrate (12.5% Vitamin C) retails for around $88, which places it in the premium range for serums. Check the "Where to Buy" section above for current retailer prices.
The main drawbacks to be aware of: Propylene glycol high in deck — not for sensitized routines; Silicone-heavy texture may pill under sunscreens or makeup; Citrus oils + limonene + citral mean fragrance-averse users should steer clear.
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Powerful-Strength Line-Reducing Concentrate (12.5% Vitamin C)
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